{"id":330389,"date":"2024-12-02T18:37:45","date_gmt":"2024-12-02T17:37:45","guid":{"rendered":"https:\/\/zakrasnejsivimperk.cz\/?p=330389"},"modified":"2024-12-02T18:37:45","modified_gmt":"2024-12-02T17:37:45","slug":"z-prvni-ruky-nebezpecne-latky-v-elektronickych-cigaretach-poskozuji-ochrannou-vrstvu-plic","status":"publish","type":"post","link":"https:\/\/zakrasnejsivimperk.cz\/?p=330389","title":{"rendered":"Z PRVN\u00cd RUKY: Nebezpe\u010dn\u00e9 l\u00e1tky v elektronick\u00fdch cigaret\u00e1ch po\u0161kozuj\u00ed ochrannou vrstvu plic"},"content":{"rendered":"
\"\"Vitamin E acet\u00e1t a n\u011bkter\u00e9 dal\u0161\u00ed l\u00e1tky obsa\u017een\u00e9 v liquidech e-cigaret deformuj\u00ed a oslabuj\u00ed ochrannou lipidovou vrstvu uvnit\u0159 plic. Zjistili to v\u011bdci z \u00dastavu fyzik\u00e1ln\u00ed chemie J. Heyrovsk\u00e9ho AV \u010cR ve spolupr\u00e1ci s Helsinskou univerzitou. Studii vydal \u010dasopis Scientific reports<\/a> v nakladatelstv\u00ed Nature.<\/h6>\n

Na n\u00e1sledky kou\u0159en\u00ed elektronick\u00fdch cigaret, takzvan\u00e9ho vapov\u00e1n\u00ed, zem\u0159ely p\u0159ed n\u011bkolika lety ve Spojen\u00fdch st\u00e1tech des\u00edtky lid\u00ed a dal\u0161\u00ed tis\u00edcovky trp\u011bly zdravotn\u00edmi pot\u00ed\u017eemi. V\u011bdc\u016fm se v roce 2019 poda\u0159ilo objasnit tato z\u00e1hadn\u00e1 \u00famrt\u00ed spojovan\u00e1 s elektronick\u00fdmi cigaretami. Zjistili, \u017ee hlavn\u00ed p\u0159\u00ed\u010dinou po\u0161kozen\u00ed plic byl acet\u00e1t vitaminu E (tokoferol acet\u00e1t) obsa\u017een\u00fd v n\u00e1pln\u00edch e-cigaret, tzv. liquidech. V d\u016fsledku toho se p\u0159estal tokoferol acet\u00e1t v liquidech pou\u017e\u00edvat. Ov\u0161em i nad\u00e1le se do liquid\u016f p\u0159id\u00e1vaj\u00ed r\u016fzn\u00e9 l\u00e1tky, nap\u0159. konzervanty, barviva a p\u0159\u00edchut\u011b, z nich\u017e n\u011bkter\u00e9 maj\u00ed podobn\u00e9 vlastnosti jako tokoferoly.<\/p>\n

Tokoferol m\u011bn\u00ed povrchov\u00fd tlak<\/h6>\n

V\u011bdci z \u00dastavu fyzik\u00e1ln\u00ed chemie J. Heyrovsk\u00e9ho AV \u010cR ve spolupr\u00e1ci s Helsinskou univerzitou zkoumali, jak\u00fdm zp\u016fsobem tokoferoly ovliv\u0148uj\u00ed pl\u00edce na molekul\u00e1rn\u00ed \u00farovni. A odhalili, pro\u010d je vitamin E v plic\u00edch \u0161kodliv\u00fd, zat\u00edmco p\u0159i jin\u00e9m zp\u016fsobu u\u017e\u00edv\u00e1n\u00ed, nap\u0159. peror\u00e1ln\u00edm, je zdrav\u00ed prosp\u011b\u0161n\u00fd.<\/p>\n

P\u0159i v\u00fdzkumu badatel\u00e9 pou\u017eili prase\u010d\u00ed surfaktant, co\u017e je proteinov\u011b-lipidov\u00e1 vrstva na povrchu plicn\u00edch skl\u00edpk\u016f, kter\u00e1 je d\u016fle\u017eit\u00e1 pro spr\u00e1vnou funkci plic. Vzorky surfaktantu p\u0159id\u00e1vali na vrstvu vody, je\u017e je v plic\u00edch p\u0159irozen\u011b obsa\u017eena, nechali na n\u011bj p\u016fsobit tokoferol a sledovali povrchov\u00fd tlak b\u011bhem roztahov\u00e1n\u00ed a smr\u0161\u0165ov\u00e1n\u00ed vzorku, kter\u00e9 napodobovalo d\u00fdch\u00e1n\u00ed. Zjistili, \u017ee povrchov\u00fd tlak se prudce zv\u00fd\u0161\u00ed.<\/p>\n

\u201eVzorky jsme tak\u00e9 zkoumali pod fluorescen\u010dn\u00edm mikroskopem. Vid\u011bli jsme, \u017ee po p\u0159id\u00e1n\u00ed tokoferolu na vzorek vznikaly deformace a shluky molekul, a to p\u0159esn\u011b ve chv\u00edli, kdy se za\u010dal povrchov\u00fd tlak zvy\u0161ovat, co\u017e znamen\u00e1, \u017ee tokoferol se do vrstvy surfaktantu zabudoval,\u201c<\/em> popisuje vedouc\u00ed v\u00fdzkumu Lukasz Cwiklik z \u00dastavu fyzik\u00e1ln\u00ed chemie J. Heyrovsk\u00e9ho AV \u010cR. Z\u00e1v\u011bry experiment\u016f potvrdili tak\u00e9 v\u011bdci z Helsinek, kte\u0159\u00ed provedli molekul\u00e1rn\u00ed simulace.<\/p>\n

\u0160kod\u00ed i z\u00e1klad liquid\u016f<\/h6>\n

Badatel\u00e9 se rozhodli sv\u00e9 z\u00e1v\u011bre\u010dn\u00e9 shrnut\u00ed prov\u011b\u0159it i v pokusech s e-cigaretou. Pou\u017eili r\u016fzn\u00e9 druhy liquid\u016f, napodobovali kou\u0159en\u00ed e-cigarety a sledovali zm\u011bny v povrchov\u00e9m tlaku surfaktantu po ur\u010dit\u00e9 dob\u011b kou\u0159en\u00ed. Op\u011bt se uk\u00e1zalo, \u017ee p\u0159i pou\u017eit\u00ed liquidu obsahuj\u00edc\u00edho tokoferol se povrchov\u00fd tlak prudce zvy\u0161uje. V\u011bdci ale do\u0161li je\u0161t\u011b k dal\u0161\u00edmu z\u00e1v\u011bru, a ten je alarmuj\u00edc\u00ed. Kdy\u017e pou\u017eili liquidy, kter\u00e9 se b\u011b\u017en\u011b prod\u00e1vaj\u00ed, ale tokoferol neobsahuj\u00ed, povrchov\u00fd tlak se tak\u00e9 m\u011bnil \u2013 ov\u0161em v tomto p\u0159\u00edpad\u011b klesal.<\/p>\n

\u201eZ toho vypl\u00fdv\u00e1, \u017ee nep\u0159\u00edzniv\u00fd vliv na pl\u00edce m\u00e1 i z\u00e1klad liquid\u016f,\u201c<\/em> vysv\u011btluje Lukasz Cwiklik.<\/p>\n

V\u00fdzkum poskytuje nov\u00e9 molekul\u00e1rn\u00ed poznatky o nebezpe\u010d\u00ed p\u0159\u00edsad v produktech pro vaping. Obzvl\u00e1\u0161t\u011b obez\u0159etn\u00ed by m\u011bli b\u00fdt lid\u00e9 v p\u0159\u00edpadech, kdy si sm\u011bs liquidu pro vapov\u00e1n\u00ed p\u0159ipravuj\u00ed sami z p\u0159\u00edsad, kter\u00e9 se b\u011b\u017en\u011b pro vapov\u00e1n\u00ed nepou\u017e\u00edvaj\u00ed.<\/p>\n

(tz-av\u010dr)<\/strong><\/p>\n

\n

 <\/p>\n

Informujeme:<\/h6>\n

\u010cesk\u00e1 obchodn\u00ed inspekce zjistila ve t\u0159et\u00edm \u010dtvrtlet\u00ed 165 p\u0159\u00edpad\u016f prodeje alkoholu mladistv\u00fdm, oproti druh\u00e9mu \u010dtvrtlet\u00ed jde o v\u00fdrazn\u00fd n\u00e1r\u016fst<\/a><\/h4>\n

Na Strakonicku za\u010daly pr\u00e1ce na oprav\u011b silnice mezi Vod\u0148any a Lidmovicemi<\/a><\/h4>\n

Zimn\u00ed Srd\u00ed\u010dkov\u00e9 dny<\/a><\/h4>\n

P\u0158E\u010cT\u011aTE SI U N\u00c1S: Den\u00edk Metro \u2013 2. prosince 2024<\/a><\/h4>\n
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 <\/p>\n","protected":false},"excerpt":{"rendered":"

Vitamin E <\/p>\n","protected":false},"author":2,"featured_media":330391,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"gallery","meta":{"footnotes":""},"categories":[70],"tags":[],"jetpack_featured_media_url":"https:\/\/zakrasnejsivimperk.cz\/wp-content\/uploads\/2024\/12\/02\/z-ruky-av-cr.jpg","_links":{"self":[{"href":"https:\/\/zakrasnejsivimperk.cz\/index.php?rest_route=\/wp\/v2\/posts\/330389"}],"collection":[{"href":"https:\/\/zakrasnejsivimperk.cz\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/zakrasnejsivimperk.cz\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/zakrasnejsivimperk.cz\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/zakrasnejsivimperk.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=330389"}],"version-history":[{"count":1,"href":"https:\/\/zakrasnejsivimperk.cz\/index.php?rest_route=\/wp\/v2\/posts\/330389\/revisions"}],"predecessor-version":[{"id":330390,"href":"https:\/\/zakrasnejsivimperk.cz\/index.php?rest_route=\/wp\/v2\/posts\/330389\/revisions\/330390"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/zakrasnejsivimperk.cz\/index.php?rest_route=\/wp\/v2\/media\/330391"}],"wp:attachment":[{"href":"https:\/\/zakrasnejsivimperk.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=330389"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zakrasnejsivimperk.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=330389"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zakrasnejsivimperk.cz\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=330389"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}